Dephasing of planar Ge hole spin qubits due to 1/$\textit{f}$ charge noise
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917980255813632 |
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| author | Wang, Zhanning Gholizadeh, Sina Hu, Xuedong Sarma, S. Das Culcer, Dimitrie |
| author_facet | Wang, Zhanning Gholizadeh, Sina Hu, Xuedong Sarma, S. Das Culcer, Dimitrie |
| contents | Hole spin qubits in Ge, investigated for all-electrical spin manipulation because of its large spin-orbit coupling, are exposed to charge noise leading to decoherence. Here we construct a model of $1/f$ noise from individual fluctuators and determine the dephasing time $T_2^*$ as a function of qubit properties. $T_2^*$ decreases with increasing magnetic field and is an order of magnitude longer for out-of-plane than for in-plane fields for the same Zeeman energy. $T_2^*$ shows little variation as a function of the top gate field and is a complex function of the dot radius. Our results should help experiments to enhance coherence in hole qubit architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_10302 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dephasing of planar Ge hole spin qubits due to 1/$\textit{f}$ charge noise Wang, Zhanning Gholizadeh, Sina Hu, Xuedong Sarma, S. Das Culcer, Dimitrie Mesoscale and Nanoscale Physics Hole spin qubits in Ge, investigated for all-electrical spin manipulation because of its large spin-orbit coupling, are exposed to charge noise leading to decoherence. Here we construct a model of $1/f$ noise from individual fluctuators and determine the dephasing time $T_2^*$ as a function of qubit properties. $T_2^*$ decreases with increasing magnetic field and is an order of magnitude longer for out-of-plane than for in-plane fields for the same Zeeman energy. $T_2^*$ shows little variation as a function of the top gate field and is a complex function of the dot radius. Our results should help experiments to enhance coherence in hole qubit architectures. |
| title | Dephasing of planar Ge hole spin qubits due to 1/$\textit{f}$ charge noise |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2408.10302 |